CN103884881B - A kind of multi-channel signal acquisition probe with adapter - Google Patents

A kind of multi-channel signal acquisition probe with adapter Download PDF

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Publication number
CN103884881B
CN103884881B CN201210562819.8A CN201210562819A CN103884881B CN 103884881 B CN103884881 B CN 103884881B CN 201210562819 A CN201210562819 A CN 201210562819A CN 103884881 B CN103884881 B CN 103884881B
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China
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adapter
row
jack
probe
double
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CN103884881A (en
Inventor
张琰
史慧
王悦
王铁军
李维森
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Rigol Technologies Inc
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Rigol Technologies Inc
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Abstract

The present invention relates to a kind of multi-channel signal acquisition probe with adapter, which includes:Plug, the ribbon cable with multiple coaxial cables, the adaptor interface box with the first pcb board and double jack and row's parent signal collection adapter connected in sequence, switching circuit board is set in row's parent signal collection adapter, its one end is equipped with the double contact pin with the double jack grafting of adaptor interface box;Its other end has a double jack, electrical connection of each jack with corresponding contact pin by the cabling independence on switching circuit board, and signal attenuation circuit is equipped between the cabling of switching circuit board.The present invention gathers adapter by arranging parent signal and the measured source that arrange pin type can be measured, easy to use, quick, it is not necessary to as the prior art with measured source small probe being connected one by one.

Description

A kind of multi-channel signal acquisition probe with adapter
Technical field
The present invention relates to a kind of probe is shown, more particularly to a kind of multi-channel signal acquisition probe with adapter.
Background technology
High performance multi-channel signal capture probe on the market at present, in order to ensure to gather the quality of signal, each of which is led to Road can be using mutually independent coaxial cable come transmission telecommunications number.Some independent coaxial cables on electrical property are not by with Same processing technology forms a ribbon or columnar thicker broader cable.One end of the cable is connected to a connection Device, for being connected with each other with the connector in measuring instrument, the interface as measured signal to measuring instrument.The other end passes through not Same structure is broken up into each independent coaxial line, has small-signal probe or other collections alone on each coaxial line Recoil simulator.Entrance as measured signal.Wherein, the center conductor of coaxial cable is used as the path of signal transmission. The outer shielding conductor of coaxial cable is used to shield to ensure the quality of signal, this outer shielding conductor, is usually used to Ground connection.
On the other hand, the other end of ribbon cable can be fixed on one piece of built-up circuit platelet with the technique such as welding or crimping On.The central signal conductors and exterior shield layer conductor of wherein every coaxial signal cable are soldered to the multiple of switching circuit board Junction.Then pinboard separates the filament probe of some structure independence again.Thin probe be used to adopt with tested point contact Collect signal.This probe needs one group of front-end circuit per autonomous channel all the way, for preferably gathering signal.This partial circuit Often it is soldered on this pinboard.But this partial circuit needs are more near better apart from measured source, the scheme of the above is in front end A bit of cable is also spaced between circuit and measured source, this will have a negative impact the effect of test.
By taking Fig. 1 as an example:One end of ribbon cable is connector 1, and the other end is pinboard 2, and pinboard 2 separates some small Probe 3.Front-end circuit is typically placed at 2 on pinboard.
Also another way, some independent coaxial cables are directly connected to the small probe in front end from surveying instrument. Front-end circuit is placed on pinboard.The advantage of doing so is that test measurement when this partial circuit and measured source distance most Short, measurement effect is preferable.It is done so that also there is negative effect to measurement convenience.If measured source is one group of row's pin, survey Being connected with measured source small probe one one is would have to during amount.And the measured source for often arranging aciculiform formula is most commonly seen 's.So can have a great impact for connection reliability, and very inconvenient user's operation.
By taking Fig. 2 as an example:A plurality of independent coaxial cable one end is respectively connected to connector 4, middle connecing by special designing Head, such as sleeve, or be an entirety by beam by cable processing technology.The other end is separated into independent small spy again First 6, front-end circuit is typically placed on small probe 6.Chinese patent CN200780018189 discloses a kind of multi channel signals Probe is obtained, it is similar with the structure, it is equipped with front-end circuit in small probe 6.The front-end circuit of the prior art is made of damping resistance, One damping resistance is connected in series among the calibrating terminal and cable of small probe 6, the higher frequency that can so adjust probe is rung Should, reduce ring, i.e. damped oscillation caused by probe cable.
And such the problem of maximum of popping one's head in now on the market is, it is necessary to small when the measured source of aciculiform formula is arranged in test Probe being connected with measured source one by one, it is inconvenient to use.
The content of the invention
For above the deficiencies in the prior art, the present invention provides a kind of multi-channel signal acquisition probe with adapter.
The purpose of the present invention is achieved through the following technical solutions:
A kind of multi-channel signal acquisition probe with adapter, the probe include:Plug connected in sequence, have it is more The ribbon cable of a coaxial cable, the adaptor interface box with the first pcb board and double jack and row's parent signal collection are suitable Orchestration;
The coaxial cable has central signal conductors, internal insulating layer, gauze screen and exterior insulation respectively from the inside to the outside Layer;
One socket hole of the double jack of adaptor interface box passes through a plurality of cabling on the first pcb board and multiple coaxial lines The electrical connection of the central signal conductors independence of cable, another socket hole of double jack by the ground wire on the first pcb board with it is multiple The electrical connection of the gauze screen independence of coaxial cable;
Switching circuit board is set in row's parent signal collection adapter, its one end is equipped with inserts with the double jack of adaptor interface box The double contact pin connect;Its other end has double jack, and each jack passes through the cabling on switching circuit board with corresponding contact pin Independent electrical connection, is equipped with signal attenuation circuit between the cabling of switching circuit board.
Further, each contact pin of each jack and double contact pin of the double jack of parent signal collection adapter is arranged Between cabling be equipped with a signal attenuation circuit.
Further, it is characterised in that a groove, row's parent signal collection adaptation are provided with the adaptor interface box A protrusion to fasten with the groove is provided with device.
Further, the attenuator circuit includes:The damping resistance and bleeder circuit of series connection, described damping resistance one end are electrically connected The jack of row's parent signal collection adapter is connect, described bleeder circuit one end is electrically connected row's parent signal collection adapter Contact pin, the bleeder circuit include resistance and capacitance parallel with one another.
Further, there is poroid insulant, the central signal conductors of each coaxial cable are worn respectively on first pcb board Each the guiding clearance hole for crossing the poroid insulant is welded on the weld of first pcb board.
The advantage of the invention is that:
The present invention by redesigning the topological structure of high performance multi-channel universal probe and the probe attachment structure of front end, Superior signal acquisition performance can be farthest provided and be user-friendly.Add replaceable a variety of adaptations at the same time Device, can meet various test requests.
1. it can realize that a variety of instrument combination modes measure, can directly measured source insertion when measured source is double needle construction Row's parent signal collection adapter measures;
2. by arranging the signal attenuation circuit in parent signal collection adapter in switching circuit board, multichannel can be obtained The bandwidth of probe makes choice, and can obtain the probe of different bandwidth, there is provided make to user by optimizing attenuator circuit parameter With realizing the measurement of various bandwidth.
Brief description of the drawings
Fig. 1:A kind of small probe connection mode in the prior art;
Fig. 2:Another small probe connection mode in the prior art;
Fig. 3 (a):A kind of multi-channel signal acquisition probe structure diagram with adapter of the present invention;
Fig. 3 (b):Test accessories structure diagram;
Fig. 4:Connection signal between adaptor interface box, row's parent signal collection adapter and small probe adapter Figure;
Fig. 5:Adaptor interface box close-up schematic view;
Fig. 6:Arrange parent signal collection adapter inner structure diagram;
Fig. 7:Small sonde configuration schematic diagram;
Fig. 8:Signal attenuation circuit schematic diagram;
Fig. 9:The connection diagram of small probe and test clip;
Figure 10:The connection diagram of small probe and test probe;
Figure 11:Small probe and the connection diagram of test accessories;
Figure 12:Small probe and ground connection extension structure diagram;
Figure 13:Small probe and ground connection extension attachment structure schematic diagram;
Figure 14:Small probe is connected the row to be formed in 2 × n mothers row with ground connection extension;
Figure 15:Small probe is connected to form the female array of 2 × n rows with ground connection extension;
Figure 16:Arrange parent signal collection adapter and male connector and the connection diagram of female extended line;
Figure 17:Arrange the connection diagram between parent signal collection adapter and female extended line and test clip.
Embodiment
Below in conjunction with attached drawing, the present invention is described in detail.Such as Fig. 3(a)It is shown, a kind of multichannel with adapter Signal acquisition probe includes:Plug 1 connected in sequence, the ribbon cable 2 with multiple coaxial cables, with the first pcb board With the adaptor interface box 3 and row's parent signal collection adapter 4 of double jack;The coaxial cable has respectively from the inside to the outside Central signal conductors, internal insulating layer, gauze screen and external insulation;One socket hole of the double jack of adaptor interface box 3 By being electrically connected for a plurality of cabling on the first pcb board and the central signal conductors independence of multiple coaxial cables, double jack Another socket hole is electrically connected by the ground wire on the first pcb board and the gauze screen independence of multiple coaxial cables;The female letter of the row Switching circuit board is set in number collection adapter 4, its one end is equipped with the double contact pin with the double jack grafting of adaptor interface box; Its other end has a double jack, electrical connection of each jack with corresponding contact pin by the cabling independence on switching circuit board, Signal attenuation circuit is equipped between the cabling of switching circuit board.
The plug 1 is used for being connected fixation with the signaling interface of measuring instrument, and ribbon cable 2 includes inside it a plurality of Independent thin coaxial cable on electrical property.Adaptor interface box 3 can be equipped with different probe distal end adapters, for example, being equipped with Arrange parent signal collection adapter 4, the measured source for the row's of measurement aciculiform formula;Will row's parent signal collection adapter 4 grafting row's aciculiform The measured source of formula, it becomes possible to measured signal is passed sequentially through into adaptor interface box 3 and ribbon cable 2, is connect eventually through plug 1 Enter the signaling interface of test equipment.In addition, adaptor interface box 3 may be equipped with a small probe adapter 5, for transferring Some tiny probes 6, the small probe 6 are used for direct measuring signal source.
The present invention can measure the measured source for arranging pin type as a result of row's parent signal collection adapter 4, The double-row needle of measured source is inserted directly into the double jack of row's parent signal collection adapter to be measured, easy to use, fast It is prompt, it is not necessary to as the prior art small probe being connected with measured source one by one.
With reference to Fig. 3(b), it is of the invention also comprising abundant front end detection annex, including:Ground connection extension annex 7, male connector extend Line 8, female extended line 9, tests probe 10, test clip 11.Various annexes can also freely carry out a variety of collocation and use, more just Just user measures.
The company being illustrated in figure 4 between adaptor interface box, row's parent signal collection adapter and small probe adapter Connect schematic diagram.With reference to Fig. 3(a), plug 1 can separate two ribbon cables 2, and one end of each ribbon-style cable 2 is all connected with Adaptor interface box 3, row's parent signal collection adapter 4 can be inserted on an adaptor interface box 3, small probe adapter 5 can be inserted on another adaptor interface box 3;At most 10 small probe 6 can be inserted on small probe adapter 5.Ginseng According to Fig. 4, a groove is provided with adaptor interface box 3, one and the groove phase are provided with row's parent signal collection adapter 4 The protrusion of engaging.When row's parent signal collection adapter, which inserts 4, enters adaptor interface box 3, due to the fluted and raised row of may be such that Parent signal gathers adapter 4 and adaptor interface box 3 will not be anti-inserted.As shown in figure 5, first on the adaptor interface box 3 There is poroid insulant 25, the central signal conductors of each coaxial cable are each passed through the poroid insulant 25 on pcb board 26 Each be oriented to clearance hole and be welded on the weld of first pcb board 26.Include several cables on poroid insulant 25 Clearance hole is oriented to, after each bar coaxial cable in ribbon cable is passed through the cable guide clearance hole, the phase on the first PCB26 plates The solder joint answered goes out to be welded.The setting of above-mentioned poroid insulant to weld more convenient and quicker and welding effect is neat, and Ensure the maximum bandwidth of probe, and the signal isolation of interchannel, reduce channels crosstalk.It is mutually isolated by the first pcb board 26 Cabling be electrically connected with the double jack being welded on the first pcb board 26 after, coordinate shell, just constitute adaptor interface box 3.
The row's of being illustrated in figure 6 parent signal collection adapter inner structure diagram, row's parent signal collection adapter 4 include upper The switching circuit board 13 of lid 12, lower cover 14 and inside, 13 its one end of circuit board is equipped with inserts with the double jack of adaptor interface box The double contact pin connect;Its other end has double jack, and each jack passes through the cabling independence on circuit with corresponding contact pin It is electrically connected, signal attenuation circuit is equipped between the cabling of switching circuit board.The attenuator circuit includes:The damping resistance of series connection and Bleeder circuit, described damping resistance one end are electrically connected the jack of row's parent signal collection adapter, described bleeder circuit one end The contact pin of row's parent signal collection adapter is electrically connected, the bleeder circuit includes resistance and capacitance parallel with one another.It will decline Subtract circuit design in row's parent signal collection adapter, namely the place closest to measured source, when high-frequency signal is measured, The interference of external electromagnetic ripple is not easily susceptible to, the guarantor of maximum is also provided while providing and testing measurement convenience on measurement performance Card.
Herein, can between the multiple jacks of double jack and multiple contact pins of double contact pin of row's parent signal collection adapter There is independent attenuator circuit with the corresponding contact pin time with a shared attenuator circuit or each jack.
Small sonde configuration schematic diagram is illustrated in figure 7, there is one piece of small circuit in the head of its 6 handgun shape of medium and small probe Plate 15, is equipped with signal attenuation circuit above, and pistol head shapes head 16 is processed into by encapsulated technique.Its medium and small circuit board Long end 17 is the entrance for gathering signal, and short end 18 is ground terminal.
Fig. 8 is the signal attenuation circuit schematic diagram in switching circuit board in row's parent signal collection adapter.Wherein, P1 mono- A pad, for a jack in a socket hole of the row's of welding parent signal collection adapter, connects, P2 mono- with measured signal A pad, a contact pin for a socket pin of the row's of welding parent signal collection adapter.Arrange the another of parent signal collection adapter Each jack in one socket hole is electrically connected by the ground wire of switching circuit board with each contact pin in another socket pin respectively, is used In the reference ground of connection circuit-under-test.Wherein R3, C2 are the input resistance and capacitance of test equipment.R1 in switching circuit board is Damping resistance, for improving frequency response, R2, C1 are used for and R3, C2 carry out partial pressure, form decay.Such as without considering parasitic capacitance, Such as need decay A times, then A=(R2+R3)/R3=(C1+C2)/C1.Wherein C1 is used for compensating test equipment input capacitance C2, makes high frequency It is basically identical with the amplitude-frequency response of low frequency.
Attenuator circuit, determines the attenuation multiple of multi-channel signal acquisition probe, when changing R2 and C1, just changes and declines Double-diminished number.For example, in the case of without considering parasitic capacitance, need to such as decay A times, then A=(R2+R3)/R3=(C1+C2)/ C1, compared with Good, when the input resistance of input equipment is 10k Ω, input capacitance 90pF, R2 is 90k Ω, C1 10pF in attenuator circuit, When damping resistance takes 249 Ω, it is possible to achieve preferable frequency response, reaches the bandwidth of more than 300MHz.Wherein C1 is used to compensate Equipment under test input capacitance C2, makes the amplitude-frequency response of high and low frequency basically identical.Attenuation multiple, signal cable bandwidth, damping Resistance R1 and circuit board parasitic parameter determine that multichannel obtains the bandwidth of probe, by optimizing these parameters, it is possible to achieve The probe of different bandwidth, there is provided user uses, it is possible to realizes a variety of Measurement bandwidths.
Fig. 9 is the connection diagram of small probe and test clip, and pistol head shapes head 16 may be inserted into test clip 11, survey The Small clamp of 11 front ends of examination folder, can clamp chip pin or remaining exposed conductor measures.More aspect user makes With.
Figure 10 is the connection diagram of small probe and test probe;Figure 11 is small probe and the connection signal of test accessories Figure;It is attached that pistol head shapes head 16 can also be inserted into a variety of tests such as male connector extended line 8, female extended line 9, test probe 10 Part.High-accuracy resistance can be all in series with such test accessories, for improving the frequency response of signal, reaches preferably test effect Fruit.Front end be changed to test probe 10 if then its test effect will be more preferable.
For high performance measurement double-row needle signal, present invention also offers another implementation.Small probe is carried out Extension connection measurement, as shown in figs. 12-15, form 2 in the pistol head shapes head 16 of small probe insertion ground connection extension annex 7 × A row during n rows are female.It is as shown in figure 16 ground connection extension enlarged diagram, ground connection extension annex 7 has a policy above, uses To be inserted into the hole of the lower section of pistol head shapes head 16.And on 7 also have a semicircular small boss 201, for 7 on Semicircle small rut 202 locks.
In Figure 13, the wherein left side of pistol head shapes head 16 has been designed to 3 pilot holes 21, and right side has been designed to 3 A raised assembles post 22.Pilot hole 21 and the size of assembles post 22, according to the coefficient of elasticity of cover material, by calculating, are protected Card can be connected closely after they are directed at pressing.It can be formed when some pistol head shapes heads 16 are laminated installation in this way One double parent structure, the measurement for double-row needle measured source connect.
In Figure 16, row's parent signal collection adapter 4 and male connector and the connection diagram of female extended line;Arrange parent signal collection Attenuator circuit is included in adapter 4.So male connector extended line 8 and female extended line 9 can be inserted on this adapter, to carry out Measurement.More convenient user uses.
In Figure 17, the connection diagram between row's parent signal collection adapter and female extended line and test clip;Work as needs When measurement chip pin or the measured source of other more difficult fixations, testing jig 11 can also be installed on female extended line 9, by Test clip 11 is fixed clamping measured source.
When being tested using probe, the plug 1 with spring button is used for being connected fixation with measuring instrument, from its tail Part goes out two independent ribbon cables 2.Include thin coaxial cable independent on 10 electrical properties inside the ribbon cable 2. Two ribbon cables, 2 other end is an expansion interface 3 respectively, can be equipped with different probe distal end adapters, including diagram Row's parent signal collection adapter 4, it is small probe adapter 5.Wherein arranging inside parent signal collection adapter 4 has independent decline Powered down road, can the signal of synchro measure thereon on the row's of being inserted directly to pin.It is user-friendly.Its medium and small probe adapter 5 inside do not include attenuator circuit, collect switching part as small probe 6, may be inserted into 10 small probe 6.The small spy of each Attenuator circuit is included in first 6 front end pistol head shapes head 16, directly can measure measured source with it.
When measured source is double needle construction, user can gather adapter 4 by the row's of insertion parent signal on expansion interface 3, Then using arrange parent signal collection adapter 4 double-row needle measured source is measured.According to the different test requests of user, this is specially Profit also provides other measuring method, and user can be inserted into small probe adapter 5, small probe switching on expansion interface 3 5 front end of adapter may be inserted into some small probes 6 again.Each small probe 6 can carry out double-row needle after installing ground connection extension annex 7 The test of wherein two pins of measured source.When installing the small probe 6 of ground connection extension annex 7 some, pass through the pilot hole in structure After 21 are attached with assembles post 22, it will one row of composition is female, and the testing sequence of row mother can be by varying small probe 6 Between assembly sequency be adjusted, bring more preferably convenience and flexibility for the test measurement of user.
When needing to measure discrete independent signal source, present invention provides various selectable scheme.Small probe 6 is inserted Enter in small probe adapter 5, be then inserted into male connector extended line 8 and female extended line 9, male connector extended line 8 on small probe 6 Connection measured source is used to female extended line 9.The pistol head shapes head 16 of small probe 6 can also be inserted into test clip 11, test clip 11 is used for connecting measured source.Can also male connector extended line 8 and the parent signal collection of 9 rows of insertion of female extended line is suitable On orchestration 4, then male connector extended line 8 and female extended line 9 are used to connection measured source.When the bad connection of measured source is fixed, The nose end of female extended line 9 can also be inserted into test clip 11, by test clip 11 come more reliable clamping measured source.
It should be appreciated that the detailed description carried out above by preferred embodiment to technical scheme is schematical It is and nonrestrictive.Those of ordinary skill in the art can remember each embodiment on the basis of description of the invention is read The technical solution of load is modified, or carries out equivalent substitution to which part technical characteristic;And these modifications or replacement, and The essence of appropriate technical solution is not set to depart from the spirit and scope of various embodiments of the present invention technical solution.

Claims (5)

1. a kind of multi-channel signal acquisition probe with adapter, it is characterised in that the probe includes:It is connected in sequence to patch Head, the ribbon cable with multiple coaxial cables, the adaptor interface box with the first pcb board and double jack and the female letter of row Number collection adapter;
The coaxial cable has central signal conductors, internal insulating layer, gauze screen and external insulation respectively from the inside to the outside;
One socket hole of the double jack of adaptor interface box passes through a plurality of cabling on the first pcb board and multiple coaxial cables The electrical connection of central signal conductors independence, another socket hole of double jack by the ground wire on the first pcb board with it is multiple coaxial The electrical connection of the gauze screen independence of cable;
Switching circuit board is set in row's parent signal collection adapter, its one end is equipped with and the double jack grafting of adaptor interface box Double contact pin;Its other end has double jack, and each jack is independent by the cabling on switching circuit board with corresponding contact pin Electrical connection, be equipped with signal attenuation circuit between the cabling of switching circuit board.
A kind of 2. multi-channel signal acquisition probe with adapter according to claim 1, it is characterised in that the female letter of row Cabling between each jack of double jack and each contact pin of double contact pin of number collection adapter is equipped with a letter Number attenuator circuit.
A kind of 3. multi-channel signal acquisition probe with adapter according to claim 1 or 2, it is characterised in that institute State and a groove is provided with adaptor interface box, one is provided with row's parent signal collection adapter and is fastened with the groove It is raised.
A kind of 4. multi-channel signal acquisition probe with adapter according to claim 1 or 2, it is characterised in that institute Stating attenuator circuit includes:The damping resistance and bleeder circuit of series connection, described damping resistance one end are electrically connected row's parent signal and adopt Collect the jack of adapter, described bleeder circuit one end is electrically connected the contact pin of row's parent signal collection adapter, the partial pressure electricity Road includes resistance and capacitance parallel with one another.
A kind of 5. multi-channel signal acquisition probe with adapter according to claim 1 or 2, it is characterised in that institute Stating has poroid insulant on the first pcb board, the central signal conductors of each coaxial cable are each passed through the poroid insulant Each be oriented to clearance hole and be welded on the weld of first pcb board.
CN201210562819.8A 2012-12-21 2012-12-21 A kind of multi-channel signal acquisition probe with adapter Active CN103884881B (en)

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Publication number Priority date Publication date Assignee Title
CN111830307A (en) * 2020-06-05 2020-10-27 东风柳州汽车有限公司 Power supply detection interface device of direct current load equipment
CN114384473A (en) * 2021-11-30 2022-04-22 广东德赛矽镨技术有限公司 Data integration system and method for multi-channel analog data acquisition and output

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CN101685103A (en) * 2008-09-23 2010-03-31 特克特朗尼克公司 Probe assembly
CN201654069U (en) * 2010-04-27 2010-11-24 福建捷联电子有限公司 Keyset for flexible flat cable connector

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Publication number Priority date Publication date Assignee Title
DE69229692T2 (en) * 1991-04-24 1999-12-02 Hewlett-Packard Co., Palo Alto Method for detecting a pulse signal in a circuit using a passive probe with a large bandwidth
US6215295B1 (en) * 1997-07-25 2001-04-10 Smith, Iii Richard S. Photonic field probe and calibration means thereof
US6094042A (en) * 1998-01-30 2000-07-25 Agilent Technologies Probe compensation for losses in a probe cable
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CN201654069U (en) * 2010-04-27 2010-11-24 福建捷联电子有限公司 Keyset for flexible flat cable connector

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